Precision indicator



Nov. 8, 192 7..

K. LAUER PRECISION INDICATOR Fil ed Dec. 9. i924 3 Sheets-Sheet 1 K. LAUER PRECISION INDICATOR Filed Dec. 9. 1924 3 Sheets-Sheet 3 Patented Nov. 8, 1927.

UNITED STATESPATENT OFFICE.

KARL LAUER, OF ESSEN,

SCHAFT, OF

Applicationv filed Decemb This invention relates GERMANY, ASSIGNOR TO FRIED. KRUPP ESSEN-ON-THE-RUHR, GERMANY.

AKTIENGESELL- PRECISION INDICATOR.

to precision indicatheir lever mounted In order to securea perfect operation of precision indicators of this kind it is essential that in the middle position of the pointer a plane supposed to be laid across the summits of the notches or blades is accurately perpendicular longitudinal axis of the pointer.

the notches or to attain this, adjustable with relation with respect to the In order blades must be to each other in the direction of the longitudinal axis of the pointer. Besides, for accurately regulating the deflection of the poi sible to change the notches or blades.

well known in which only nter, it must be posdistance between the Precision indicators are the distance of the notches can be changed. In another well-known precisionindicator the notches may besides be brought into a plane extending perpendicularly with relation to the longitudinal axis of the pointer.

However,

with the last-mentioned precision indicator the two adjustments always take place in dependence of each other and itis therefore very ent invention has this drawback.

troublesome to secure a perfect work- The pres- An embodiment of the subject-matter of the invention is illustrated in the accompanying drawing in which:

Fig.

l is a front elevation,

partly in sec- .tion, of the precision indicator,

Fig. 2 is a side elevation of Fig. 1, seen from the right, some away;

Fig. 3 is a section,

along the line 33 of above, and

Fig. 4 is a section,

taken on the line 6-6 of Fig.

In a pointer shoe A (Figs.

carries a pointer a an two cheeks a and a parts being broken on an enlarged scale,

Fig. 1, seen from likewise on an enlarged scale, along the line H of Fig. 2,

seen from section on the line longitudinal section 1 and 4) which d which consists 0 other by a cross-piece a is closely guided the body B larly Figs. halves b and b engaged by the blade 0 of a blade-bearing (see particu- 4 and 6) which consists of two The blade-bearing b b is of a stilt C which is f around the fixed blades connected with each to the pressure transmitted by theffeeling 105 er 9, 1924, Serial No. 754,846, and in Germany March 27, 1924.

in connection with the feeling bolt, not shown,

of the gage. The two halves b and b are rigidly connected with each other by means of a screw bolt 1) the free end of which carries an adjusting nut b a collar 6 engages recesses a and a of the pointer shoe A and abuts against the crosspiece a. By rotating the nut b the body 13 may be adjusted perpendicularly with relation to the base and to the longitudinal axis of the pointer a. Arranged between the two cheeks a and a of the pointer shoe A is a filling piece a which determines the distance between the lower cheek portions and serves as a guide d embracing the pointer shoe A from above and of two plates d and d screwed each to one of the ends of the fork al The body I) is carried for rocking motion by a screw bolt d which is mounted in the shoe A and on which the half 6 of the positively guided by means of a slot b? (Figs. 4 and 6). The rocking of the bladebearing body D is performed by means of an adjusting screw d mounted in the traverse of the fork d and pointer shoe A. The geometrical axis of the screw 03* and the base line of the blade-bearing 1) 0 always lie in a single plane extending perpendicularly with relation to the longitudinal position in relation to the pointer is fixed by the lower surface of the cross piece a It will be readily understood from the drawings that, by suitably rotating the screw d, the base line of the blade-bearing may likewise be brought into the said plane. The blade-bearing d (1 al d is engaged by blades e and e ofa bow E which is fastened to a blade carrier F mounted in the which by means of line of the blade-bearing 5 bearing B is bearing against the axis of the pointer, since their casing H of the precision indicator. Connected to the screw d and to 'a screw f of the blade carrier F is a tension spring which tends to rotate the lever A B. D e and e contrary manner with a scale h (Fig. l). in front of which moves the pointer a".

From the foregoing it will be seen that the pointer a can be centered on the scale 53 by adjustment of the screw d, and that the amount of deflection of the pointer can be adjusted by adjustin the distance between the base-lines of t e two blade bearings by rotating the nut b. This second adjustment is permitted bythe mounting of the stilt C which permits it to rock.

I claim 1. In a precision indicator, comprisin a pointer and a lever mounted on blades, blade-bearings arranged on the lever, means for adjusting the said bearings with relation to each other perpendicularly to the base-lines of the blade-bearings and to the longitudinal axis of the pointer, and means for adjusting the bearings with relation to each other in the direction of the said pointer axis. I

2. In a precision indicator, comprising a pointer and a lever mounted on blades, two blade-bearings arranged on the lever, one of the bearings being adjustable in a direction perpendicular with relation to the base-line of the blade-bearing and to the longitudinal axis of the pointer and the other bearing being adjustable in the direction of the said axis.

3. In a precision indicator, comprising a pointer and a lever mounted on blades, tw0- blade-bearings arranged on the lever, one of the bearings being adjustable in a direction perpendicular with relation to the baseline of the blade-bearing and to the longitu- -dinal axis of the pointer and the other bearing being adjustable in the direction of the said axis, the last-said bearing being mount- 4. In a precision indicator, comprising a pointer and a lever mounted on blades, two blade-bearings arranged on the lever, one of the bearings being adjustable in a direction perpendicular with relation to the base line of the blade-bearing and -to the longitudinal axis of the pointer and the other bearing being adjustable in the direction of the said axis, the means for adjusting the first-said bearing consisting of a screw-threaded bolt extending through and being in threaded engagement with the bearing and provided with a nut which is cooperatively connected with a non-adjustable portion of the lever.

' 5. In a precision indicator, comprising a pointer and a lever mounted on blades, one of said blades being stationary and the other movable in a direction perpendicular to the longitudinal axis of the pointer and the edges of said blades, blade bearings arranged on said lever for co-operation with said blades, means for adjusting the hearing which cooperates with said movable blade in a direction perpendicular to the longitudinal axis of the pointer and to the edges of the blades, and means for adjusting the bear ings with relation to each other in the direction of said pointer axis.

The foregoing specification signed at Essen, Germany, this 6th day of November, 1924.

KARL LAUER.

plane extending perpendicw 

